MONEY REALITY · SIDE HUSTLE / 1099 TAX

Your Side Hustle Owes Self-Employment Tax

If you drive for Uber, tutor on the side, freelance, sell on Etsy, sit dogs on Rover, or get a 1099 of any kind — the IRS treats you as a business. That means 15.3% self-employment tax on top of regular income tax, and quarterly estimated payments. Most first-time 1099 earners are stunned in April. Don't be one of them.

"The IRS does not care that you didn't know. The penalty for missing quarterly estimates is the same either way."

Your situation

Expected 1099 / side-hustle gross income ($/yr)

Total revenue from your side hustle, before any expenses.

Deductible business expenses ($/yr)

Real expenses: mileage (current IRS rate ~$0.70/mi), supplies, software, home office %. Document everything.

Your W-2 day-job income (if any)

Helps determine your marginal tax bracket. Set to 0 if side hustle is your only income.

Filing status

State tax rate (%)

0% in 9 states; ~5% national average; ~10%+ in CA/NY/OR/HI/NJ.

YOUR SIDE-HUSTLE TAX SUMMARY

Gross 1099 income$0

Less: deductible expenses$0

Net self-employment income$0

Self-employment tax (15.3% of 92.35% of net)$0

Federal income tax on SE income (marginal)$0

State tax on SE income$0

Total tax owed on side hustle$0

Your quarterly estimated payments

Due Apr 15

Due Jun 15

Due Sep 15

Due Jan 15 (next yr)

Pay these online at irs.gov/payments using Form 1040-ES. Most states have their own quarterly system (check your state DOR). Late or missed payments accrue interest + penalty.

The deduction discipline: the difference between a $12,000 side hustle and a $10,000 net self-employment income is real money in your pocket if you track expenses correctly. Get a separate bank account and a separate credit card for the side hustle. Every business expense goes on that card. Mileage tracked in an app (MileIQ, Stride, IRS-compliant). Receipts photographed and stored. The CPA you'll eventually hire will thank you.

The QBI deduction (Section 199A) is worth knowing: if your taxable income is under $191,950 single / $383,900 MFJ (2026), you can deduct 20% of your qualified business income — which is most side-hustle income. That's a real reduction in your federal tax bill, automatic if you file correctly on Schedule C.

From the Money Reality series. First Job Edition Ch 6 (First 1099 / Self-Employment Tax) covers this in depth, with the deduction discipline checklist and the Schedule C walk-through. Practitioner-grade detail in the AI Integration Decoded and Tax Strategy Decoded guides if you want the deeper reference.

Illustrative only. 2026 SE tax = 15.3% (12.4% SS + 2.9% Medicare) on 92.35% of net SE earnings. Federal income tax uses 2026 brackets with standard deduction. State tax is a flat-rate approximation. QBI / §199A treatment not modeled in the headline number; consult a CPA. Not tax advice. The IRS and state DOR are the authoritative sources.